president obama and hillary clinton sat down together for an interview with "60 minutes." one of clinton's last interviews before he leaves the state department. we'll look at that tonight. >>> also tim hetherington is remembered tonight. why he's so missed. his close friend and colleague joins us for that. you'll hear that from him tonight. >>> we begin tonight with breaking news. the head of the u.s. anti-doping agency, the man who spent years investigating lance armstrong, has told cbs news that armstrong lied about his doping in his interview with oprah winfrey. the same interview that was advertised as no holds barred. lance armstrong saying he was telling the full truth. the interview where armstrong repeatedly said he was coming clean about his use of banned substances. tygart whose damning report led to the cyclist stripped of his titles and banned from the sport for life, he also told cbs news he's offered armstrong a deadline, february 6th, to cooperate fully and totally truthfully in exchange for a lessening of his lifetime ban from sports. joining me is juliet